Composite metal heat-preservation layer filled with shielding materials at two sides

Abstract

The invention discloses a composite metal heat-preservation layer filled with shielding materials at two sides. The composite metal heat-preservation layer comprises a heat preservation outer box, andinner-side neutron shielding layers, outer-side neutron shielding layers, reflecting metal foil sheets, an inner-side gamma shielding layer and an outer-side gamma shielding layer which fill the heatpreservation outer box, wherein the neutron shielding layers and the gamma shielding layers are inorganic shielding materials with metal characteristics; the filling sequence on the thickness sectionof the heat preservation layer is as the follows in sequence: an inner shell plate of the heat preservation outer box, the inner-side neutron shielding layer, the inner-side gamma shielding layer, the metal reflection foil sheets, the outer-side gamma shielding layer, the outer-side neutron shielding layer and an outer shell plate of the heat preservation outer box; and the metal reflection foilsheets are in a corrugated shape of forward-reverse double ball sockets which are vertically and horizontally arranged at regular intervals, or a regularly changed forward-reverse triangular corrugated shape or a chocolate corrugated shape, wherein two adjacent layers of the metal reflection foil sheets are stacked in a back-to-back staggered mode that the top point of one forward ball socket faces the top point of one corresponding reverse ball socket. The invention provides the composite metal heat-preservation layer with a heat-preservation and heat-insulation function and a radiation shielding function, and the composite metal heat-preservation layer can be used in a high-temperature radiation environment for a long time without needing of replacement.

Description

technical field [0001] The invention relates to the technical field of the nuclear industry, in particular to a composite work metal insulation layer filled with shielding materials on both sides. Background technique [0002] When the nuclear reactor is in normal operation, high-temperature, high-pressure, and high-radioactive cooling medium flows inside the primary equipment and pipelines of the nuclear reactor. It is necessary to install an insulation layer on the outer surface of the equipment and pipelines to reduce heat loss. Shielding materials are installed outside the equipment and pipelines to reduce the radiation dose around the equipment, which is helpful for personnel's inspection and maintenance during service. At present, the first-level equipment and the outside of the pipeline of the nuclear reactor coolant system usually use a metal insulation layer, but this metal insulation layer only has the function of heat preservation and heat insulation, and does not...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the composite metal insulation layer with radiation shielding function in the prior art is made of organic materials, which has poor high temperature resistance and long service life. short, need to be replaced regularly, the present invention provides a kind of composite function metal insulation layer filled with shielding material on both sides to solve the above problems

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